How to highlight text in epub like ibooks app

I need to highlight text in epub book,when user selects the text,i can get the text,what the user has selected,but i need to highlight,the text permanently what user selected,thanks,any help will ne appreciated. enter image description here

Solution

There's nothing built in to iOS that will do this. Some broad techniques that might work:

If you're showing the book in a web view, you might be able to wrap that area in a span and style it to create a highlight.
If you're using Core Text, you could draw the highlight in directly, either before or after drawing the text. (Your choice will decide how the highlight affects non-black text.)
You could add a transparent view over the text that draws in the highlight.

As for adding highlight-related items to the selection menu, see this Stack Overflow post. You probably won't be able to get icons in the menu like Apple does, though; that seems to be a private API. You could probably override the whole menu system if you want something closer to Apple's look, but that'll be quite a bit of work.